133666453 has 4 divisors (see below), whose sum is σ = 134255520. Its totient is φ = 133077388.

The previous prime is 133666439. The next prime is 133666469. The reversal of 133666453 is 354666331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-133666453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133666483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294193 + ... + 294646.

It is an arithmetic number, because the mean of its divisors is an integer number (33563880).

Almost surely, 2^133666453 is an apocalyptic number.

It is an amenable number.

133666453 is a deficient number, since it is larger than the sum of its proper divisors (589067).

133666453 is an equidigital number, since it uses as much as digits as its factorization.

133666453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589066.

The product of its digits is 116640, while the sum is 37.

The square root of 133666453 is about 11561.4208901847. The cubic root of 133666453 is about 511.2980556729.

The spelling of 133666453 in words is "one hundred thirty-three million, six hundred sixty-six thousand, four hundred fifty-three".